K3 MBBR Filter Media For Industrial Water Purification Made Of 100%
Virgin HDPE
Product Description
The basic design idea of MBBR is to be able to operate continuously
without blocking and backwashing, with small head loss and large
specific surface area. This can be achieved by the biofilm growing
on a smaller carrier unit, and the carrier moving freely with the
flow of water in the reactor. In aerobic reactor, the carrier is
moved by aeration; in anoxic / anaerobic reactor, the carrier is
moved by mechanical agitation. In order to prevent the loss of
filler in the reactor, a porous filter screen can be set at the
outlet of the reactor. MBBR is generally rectangular or cylindrical
structure. The rectangular reactor can be divided into several or
no grids uniformly along the length of the tank with baffles.
Generally speaking, the flow in the reactor is push flow, and in
each cell, due to aeration fluidization, the flow is completely
mixed. The specific gravity of the tank is close to that of water,
polyethylene or polypropylene suspended filler with large specific
surface area. The attached surface of biofilm in the reactor can
reach 500m2 / m3, and the actual specific surface area (inner
surface of filler) can reach 350m2 / m3. The perforated aeration
pipe is aerated on one side to make the packing circulate in the
tank. The bottom of the cylindrical reactor is provided with a
microporous aeration head. In addition, some reactors are equipped
with not only aeration device but also agitation device. These
agitation devices can make the reactor easily and flexibly used in
the anoxic state.
Technology Parameter
| Model | Unit | PE02 | PE03 | PE04 | PE05 | PE06 | PE08 | PE10 | | Spec. | mm | 11*7 | 10*7 | 16*10 | 25*12 | 25*10 | 5*10 | 25*4 | | Hole numbers | pcs | 4 | 5 | 6 | 19 | 19 | 8 | 64 | | Density | g/cm³ | 0.9-0.98 | 0.96-0.98 | 1.02-1.05 | 0.96-0.98 | | Packing numbers | pcs/m³ | >830000 | >850000 | >260000 | >970000 | >2000000 | >210000 | | Efficient surface | m²/m³ | >900 | >1000 | >800 | >500 | >3500 | >1200 | | Void ratio | % | >85 | >90 | >80 | >85 | | Dosing ratio | % | 15-68 | 15-70 | 15-65 | | Membrane-forming time | days | 3-15 | | Nitrification efficiency | gNH4-N/m³.d | 400-1200 | 500-1400 | 500-1400 | | BOD5 oxidation efficiency | gBOD5/m³.d | 2000-10000 | 2500-15000 | 2500-20000 | | COD oxidation efficiency | gCOD/m³.d | 2000-15000 | 2500-20000 | 2500-25000 | | Applicable temperature | ℃ | 5-60 | | Life-span | year | >15 |
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Advantages
1. The effect of biological phosphorus removal is good. The
influent of anaerobic zone includes the mixture of total influent
and backflow from anoxic zone II, and the mixture at the end of
anoxic zone II. Due to the full denitrification and phosphorus
accumulation reaction, the concentration of nitrate is low. After
backflow to anaerobic zone, the anaerobic phosphorus release and
storage energy of phosphorus accumulating bacteria will not be
affected, so as to fully ensure the effect of biochemical
phosphorus removal;
2. The denitrification volume load is high. Different from the
traditional secondary treatment process, the sedimentation area is
set at the end of the process section. The sedimentation area of
the sewage treatment system of the invention is set in the middle
of the process section. The effluent is not the final effluent.
There is no need to worry that the sludge concentration entering
the sedimentation area is too high, resulting in the effluent SS
exceeding the standard. Therefore, the anoxic area can be allowed
to have high sludge concentration under the same sludge load The
volume load is higher;
3. The carbon source and energy are fully utilized, one carbon is
multi-purpose. First, the backflow setting of the sewage treatment
system of the invention can utilize the characteristics of DPB
denitrifying phosphorus accumulating bacteria for simultaneous
denitrifying phosphorus removal. The phosphorus accumulating uses
nitrate nitrogen as the electronic receptor, one carbon is
dual-purpose. In addition, the high concentration sludge in anoxic
zone is conducive to the precipitation of internal carbon source,
which can make more use of the internal carbon source of the
system. When the carbon source of influent water is insufficient,
the external carbon source can be saved. After the sedimentation
area is located in the anoxic area, the sludge does not pass
through the aerobic area, avoiding the aerobic degradation of
carbon source, and can enter into the sludge, improving the value
of sludge resources and energy recovery, and the utilization of
phosphorus is the combined oxygen No3, reducing the demand for
dissolved oxygen and reducing energy consumption;
4. Nitrification is sufficient and the load is high. After passing
through the sedimentation area, the supernatant enters the biofilm
area. Because the suspension carrier is blocked in the fixed area
by the screen, it is beneficial to the attachment and growth of
microorganisms with long mud age, especially the nitrobacteria and
nitrobacteria. The nitrification effect is good, and the ammonia
nitrogen in the sewage can be fully nitrated;
5. There is only a kind of biofilm on the suspension carrier in the
biofilm area, which is simple in operation, management and control,
and high in nitrification load. At the same time, using the
multilayer structure of biofilm can provide favorable conditions
for simultaneous nitrification and denitrification, and enhance the
removal effect of nitrogen;
6. The sewage treatment system of the invention is provided with a
sedimentation area in front of the biofilm area. After
sedimentation, the supernatant enters the biofilm area. The
nitrification process depends on the microorganism attached to the
suspension carrier in the pool. The SS concentration of the
effluent is far lower than that of the activated sludge mixture,
which can reduce the filtration pressure of the membrane, improve
the membrane flux, and reduce the frequency of membrane washing and
cleaning Prolong the service life of the membrane;
7. The sludge concentration in anaerobic area and anoxic area is
high, the biofilm area relies on carrier efficient nitrification
effect, the volume load is very high, and the tank capacity is
saved. The final sludge water separation effluent adopts membrane
filtration, which has good effect of land occupation and high
system integration. Although it has good removal effect on all
indicators, the land occupation is high Very economical;
8. It is widely used in the new construction, reconstruction and
integrated sewage treatment equipment of sewage plant.
